# Minus Materials: Building Material, Boulder, United States

> Minus Materials: Minus Materials grows carbon-negative, biorenewable limestone using microalgae Based in Boulder, United States. Founded 2021.

Source: https://millionrounds.com/startup/minus-materials (Millionrounds; every figure on the page links to its filing or article)

United States · [Building Material startup](https://millionrounds.com/companies)

# Minus Materials

Minus Materials grows carbon-negative, biorenewable limestone using microalgae

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Funding reported Last round: Pre-seed

Building Material Boulder, United States

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Company summary

- **Founded:** 2021 5 years old
- **Team:** 1 1 to 10 people
- **Funding reported:** $275K in dollars
- **Last round:** Pre-seed Sept 2022

How sure we are

- ✓ **Listed** We know it exists and what it does
- 2 **Funding reported** A company dataset reports a raise
- 3 **Observed** A filing or a dated announcement confirms a round

No round for Minus Materials has been confirmed by a filing or an announcement yet, so nothing here counts toward an investor's record. [How we decide](https://millionrounds.com/methodology)

## What company datasets say Minus Materials raised

Funding, as reported

Reported in all **$275K** in dollars

Rounds **1**

Last round **Pre-seed**

Last round date **Sept 2022**

Investors listed **2**

## Building Material in United States

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